〔Day Digest〕Lithium Closes 152,160 Yuan/Ton as August Maintenance Idles 9,000-9,500 Tons, While SHFE Copper Warrants Climb 19,817 Tons Against UBS's 379,000-Ton 2027 Deficit - Supply Shock vs Inventory Build

0. Weekly Arc

Lithium reclaims the narrative. The 2701 contract settled at 152,160 yuan/ton (+0.41%) and battery-grade spot held at 151,000 yuan/ton after a cluster of August maintenance at Zhongkuang Resources, Tianhua New Energy and Jiuling Lithium took out 9,000-9,500 tons of output, with ~2,500 tons spilling into September ^[1][2]. The main contract is up 17%+ from the early-August 134,300 yuan/ton low and tested 157,500 yuan/ton on Aug 17 ^[2]. Copper pulls the opposite way: SHFE weekly inventory added 19,817 tons while UBS widens its 2027 deficit to 379,000 tons from 219,000 tons in 2026 ^[3][4]. The US Treasury's move to raise single long-bond buyback caps to at least $4 billion from $2 billion through Nov 4 eased long-end yields - 30-year back to ~5.18% from a 2007 high of 5.34%, 10-year to ~4.65% - keeping the dollar at 98.8 and metals bid ^[5][6]. Alumina's CIF floor is stuck at $70/ton on fuel oil disruption, with the Alunorte gas cut already partly restored ^[7][6].

1. Policy and Macro

• **[NEW] US Treasury, long-end backstop:** Treasury Secretary Bessent said single long-bond repurchases "may exceed $4 billion," confirming the move to raise the single long-bond liquidity support repurchase cap to at least $4 billion from $2 billion for 10-20 and 20-30 year tenors from Sep 9 through Nov 4 ^[5][6]. 30-year yield fell from a 2007 high of 5.34% to ~5.18% ^[6]. 10-year landed near 4.65% ^[6]. Dollar at 98.8, gold +4% past $4,500 ^[6].
• **[ESCALATED] Fed July minutes, hawkish:** Per Tongguan Jinyuan Commodity Daily's read, most officials remain focused on inflation risk with some even supporting a rate hike; the setup is "Fed constrains the short end, Treasury stabilizes the long end" ^[6].
• **[NEW] (single-source / unverified) Geopolitics:** Per Xinhua, the US military has "quietly" built a shipping channel through the Hormuz Strait to keep "millions of barrels" of oil per day flowing; the operation has been running for several weeks ^[5]. Treat as thin pending confirmation.
• **[NEW] SHFE rule change:** From the last trading day of August 2026, silver hedging position auto-conversion to near-delivery month is restored; for copper, the auto-converted near-delivery-month hedging position is temporarily set to 0 lots ^[8]. QFII scope widened to include hot rolled coil, stainless steel options and low-sulfur fuel oil options ^[9].

2. Key Data and Market Read

• **[NEW] Lithium carbonate, mixed signal:** 2701 contract +0.41% to 152,160 yuan/ton; battery-grade spot 151,000 yuan/ton (-650 day-on-day); industrial-grade 146,000 yuan/ton (-650); battery-grade lithium hydroxide (coarse) 138,750 yuan/ton (-750) ^[1]. MMLC early-session mid-price 151,600 yuan/ton, +500 from prior day ^[10]. Warehouse receipts +725 tons to 39,333 tons ^[1].
• **[NEW] Lithium supply-demand balance:** Weekly production -145 tons to 23,007 tons; weekly inventory -7,516 tons to 86,392 tons ^[1]. August output estimated +7% MoM to 113,000 tons, but maintenance cuts 9,000-9,500 tons, with ~2,500 tons spilling into September ^[1][2]. August downstream: ternary material +5% MoM to 93,840 tons, LFP +5% to 565,100 tons, lithium cobalt oxide +4% to 7,380 tons, lithium manganate +11% to 11,920 tons; lithium battery production +7% to 288.9 GWh ^[1].
• **[NEW] Copper inventory, split tape:** LME +3,950 tons to 239,925 tons; Comex +489 tons to 672,949 tons; SHFE warrants -3,619 tons to 53,079 tons; BC warrants -1,977 tons to 6,155 tons; Comex-LME spread narrowed to ~$250/ton ^[5]. SHFE weekly inventory added 19,817 tons; aluminum drew 18,300 tons, zinc +1,181 tons, lead -209 tons, nickel -771 tons, tin +56 tons, natural rubber -5,716 tons ^[4]. SHFE social inventory +500 tons to 134,400 tons; Shanghai premium 350 yuan, Guangdong 145 yuan ^[11].
• **[NEW] UBS deficit call:** Copper market deficit to expand from 219,000 tons in 2026 to 379,000 tons in 2027 ^[3]. Print sits against the visible SHFE warrant build.
• **[NEW] Equity reaction:** Lithium mining index intraday +7%; Rongjie Co at limit-up, Shengxin Lithium and Yongshan Lithium +6%+, Tianqi Lithium and Ganfeng Lithium both rallied ^[2].

3. Alumina and Downstream Processing

• **[NEW] Alumina, supply side:** CIF floor at $70/ton - users have not yet breached $70/ton on actual ore but costs will rise ^[7]. Guangxi has no remaining pending 2026 capacity; 5.4 million tons of alumina + 200,000 tons of aluminum hydroxide = 5.6 million tons total commissioned; this week a Shanxi alumina plant restarted and a Guangxi plant resumed smoothly ^[7]. Aluminum smelter commissioning peak has passed - Liaoning Xianglu (formerly Zhongwang) and Inner Mongolia Zha Aluminum Phase II both completed commissioning in July ^[7].
• **[NEW] Alunorte disruption:** Brazil Hydro Alunorte (~6 million tons original capacity) suspended 50% on Aug 11 due to natural gas supply, resumed Aug 14 on a temporary deal; total production impact 100,000-120,000 tons ^[7]. Treat as single-source pending the next LME/SHFE aluminum print.
• **[NEW] Aluminum spot:** East China, Central and South China premiums/discounts at -10/-80/95 yuan; ingot social inventory -11,000 tons from Monday to 875,000 tons; US-Iran war outlook uncertain ^[11].
• **[NEW] Copper foil, H1 reversal:** Supply tightening, demand expansion and product structure optimization drove strong results; some manufacturers brewing new round of price increases ^[12].
• **[NEW] LFP cathode, comprehensive recovery:** Hunan Yunneng H1 net profit +8x YoY; high-end effective capacity tight, new round of price hikes underway ^[13].

4. Tail Risks and Data Watch

• The lithium rally is testing 157,500 yuan/ton after a 17%+ push off 134,300 yuan/ton, yet warehouse receipts are still adding 725 tons week-on-week despite the supply cut ^[1][2]. Falsifiable test: whether September output absorbs the 2,500-ton spillover plus the +7% MoM run-rate without inventory rebuilding ^[1][2].
• Copper's near-term signal is split: SHFE warrants +19,817 tons in a week against UBS's 2027 deficit widening to 379,000 tons - print the band, not the point ^[3][4].
• Macro: the Treasury backstop is sized to ease liquidity, not to replace fiscal supply; if the 30-year re-tests 5.34%, the long-end risk premium reasserts ^[6].
• Source quality: the Alunorte 100,000-120,000 ton impact and the Hormuz channel story are single-source; the 30-year yield path is single-source from one desk ^[7][5][6]. Cross-check against today's Eurozone August manufacturing PMI preliminary and LME copper, aluminum and nickel inventory prints ^[14].